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Note 15 - Selected Quarterly Financial Information (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Quarterly Financial Information [Table Text Block] |
|  | Year Ended December 31, 2020 |
(In thousands, except per share data) |  | First |  |  | Second |  |  | Third |  |  | Fourth |  |  | Year |
Summary Operating Results: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  | $ | 680,525 |  |  | $ | 209,859 |  |  | $ | 652,238 |  |  | $ | 635,868 |  |  | $ | 2,178,490 |
Operating income (loss) |  |  | (137,761 | ) |  |  | (86,348 | ) |  |  | 127,073 |  |  |  | 111,299 |  |  |  | 14,263 |
Net income (loss) |  |  | (147,559 | ) |  |  | (108,544 | ) |  |  | 38,116 |  |  |  | 83,287 |  |  |  | (134,700 | )
Basic net income (loss) per common share |  | $ | (1.30 | ) |  | $ | (0.96 | ) |  | $ | 0.34 |  |  | $ | 0.73 |  |  | $ | (1.19 | )
Diluted net income (loss) per common share |  | $ | (1.30 | ) |  | $ | (0.96 | ) |  | $ | 0.33 |  |  | $ | 0.73 |  |  | $ | (1.19 | )
|  | Year Ended December 31, 2019 |
(In thousands, except per share data) |  | First |  |  | Second |  |  | Third |  |  | Fourth |  |  | Year |
Summary Operating Results: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  | $ | 827,288 |  |  | $ | 846,132 |  |  | $ | 819,568 |  |  | $ | 833,131 |  |  | $ | 3,326,119 |
Operating income |  |  | 117,626 |  |  |  | 126,692 |  |  |  | 113,391 |  |  |  | 114,859 |  |  |  | 472,568 |
Net income |  |  | 45,451 |  |  |  | 48,484 |  |  |  | 39,405 |  |  |  | 24,296 |  |  |  | 157,636 |
Basic net income per common share |  | $ | 0.40 |  |  | $ | 0.43 |  |  | $ | 0.35 |  |  | $ | 0.21 |  |  | $ | 1.39 |
Diluted net income per common share |  | $ | 0.40 |  |  | $ | 0.43 |  |  | $ | 0.35 |  |  | $ | 0.21 |  |  | $ | 1.38 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306 + Details
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